Error 101 (net::ERR_CONNECTION_RESET): The connection was reset

Hi
For the last few days I have been getting the error message Error 101 (net::ERRCONNECTIONRESET): The connection was reset when I visit a particular website. I am using Chrome, but it also happens with Firefox and IE. I have tried using my desktop and my tablet and the same thing happens.
I have also been getting a problem with the talktalk website but only on certain pages with the message Firefox can't find the server at sales.talktalk.co.uk. Don't know if these are linked. More bothered about the error 101. I have run Malwarebytes and re-started and the problem remains.

Have discovered the website I am trying to access is down! Still can't access TalkTalk sales website which they say is OK but am assuming it is their problem as couldn't get it at work either. On the plus side, no malware on computer now!